RECON: TNO occultation with 09ME10

Event between 09ME10 and star GA0820:22392559 with event index number of 1540075

Geocentric closest approach at 2021/05/08 09:56:58 UTC

J2000 position of star is 22:58:45.8 -07:52:00
Equinox of date position of star is 22:59:51.6 -07:45:13
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 28 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.1

TNO is 22.3 AU from the Sun and 22.7 AU from the Earth.
The TNO is moving 19.7 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 67 seconds.
The 1-sigma cross-track error in the shadow position is 1166 km.

The TNO has an absolute magnitude Hv=8.3
Diameter=133.0 km assuming a 5% albedo -- 6.7 sec chord
Diameter=54.3 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 09ME10, (2021/05/08 09:57UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:49.5 -29:30:31  1.2 21.76  40
81 Aqr         23:02:30.2 -06:56:46  6.1  1.04  28
PPM 206940     22:56:57.5 -07:42:31  8.3  0.72  29
PPM 206997     23:00:05.3 -07:39:38  9.5  0.11  28
09ME10         22:59:52.5 -07:45:07 16.2        28
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 09ME10, (2021/05/08 09:57UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 21.76  40
81 Aqr         23:01:23.6 -07:03:40  6.1  1.04  28
PPM 206940     22:55:50.8 -07:49:23  8.3  0.72  29
PPM 206997     22:58:58.6 -07:46:31  9.5  0.11  28
09ME10         22:58:45.8 -07:52:00 16.2        28
Positions are for J2000

Event circumstances last updated at 2021/01/20 21:33:23 UT

Marc W. Buie, Southwest Research Institute

RECON